I think your tower is similar to mine. There is a small threaded knob on each side of the tower near the top of the front legs that get removed. There is another spring loaded knob in that general vicinity that gets pulled out to release the rear tower portion of the tower from the front legs. You may need to loosen the large knobs on the bottom of the rear tower legs to allow the rear have of the tower to fold back onto the sun deck. The front tower legs fold into the bow. I always place some towels and a piece of plywood on the sun deck so the rear towers/speakers don't rest on the vinyl. Here is the only picture I have of my tower broken down: